Headlight



W. H. STEAD.

HEADLIGHT.

Arme/mon FILED nac. 19,1911.

1,335,081. Patented Mar. 30,1920

inziTEn STATES PATENT oEEIoE.

WLLIAM H. STEAD, OF BINGHAMTON, NEW YORK I-EADLIGHT.

To M wlw/n may concern.'

Be it known that l, Turman ll'. STEAD, a citizen ot the lfhiitcd States, and resident oli Binghamton, in the county ot Broome, in the State of New YorkI` have invented new and uset'ul Improvements in lleadlights. ot which the following7 taken in connection with the accolnpanying;l drawings, is a full, r-leai'. and exact description.

This invention relates to certain improvements in luadlightsr` and is particularly designed `tor use on moving;` vehicles, such ae auton'lobiles and the like.

My invention relates to the proiluction ot' a headlight producing' a combined spot and illuminating or diffused light1 the spot or concentrated portion ot the light being directed upon thc road at the required distance ahead ot -the vellicllI and the diti'used. or illuminating' light spreadingi out in front of the vehicle and to thel sides thereo't' a distance sufficient to light up all portions ol the landscape :'ul'iacent the Jfrontend oli the Vehicle. y

Other objects and advantages relate to the details ol'V constrlu'tion. as will more 'lully appear 'lroln the JfollowingY description` talien in connection with the accompanyiney drawings in which- Figure l is a front elevation of the headlight. l 'i Figrp), is a cross section on.liney 2--2,

l `i;i'.`1.

Fig. 3 is a croas section on line 5l 3, FifnQ.

Fig. 4 iS a view ot a lens that may be utilized as hereinafter described;

rThe invention as shown embodies a hol- 'low triangular casing' havin". in this speeilic` illustration. a trout wall -l-` a` base *2f* and an inclined rcarwvall -3.- eX- lending from 'substantiallyY lhe rear edge of lhe' base A2-mto the'upper edge oiI the front -l--. all ol these 'alls in this specitic illustration being; lornied' of llaas prci'mably, plane in form. ny suitable connections; inlay be provided 'or rigidly uniting' the edges ol these sheets of glass to constitute the permanent easing.

lh'et'erably the front wall --lis movable relatively to the, walls and -3- to permit access to `the interior oi. the hollow raising.

The outside surface of the rear vwall w,

, is covered bya sheet -4- which should be Specification of Letters Patent.y Patented Blair. 3U, 1920.

Application filed December 19, 1917. Serial No.v20'7,888,

. sinootlrin contour and substantially pure white in color. This sheet is held in place in any suitable manner, as by the backing a which extends over the upper edge of molding' and across the ring-shaped base -7--.

The artificial means for producing light is located entirely outside the hollow casing' and may be, as showni an electric bulb f-adapted to receive electric current 'troni any suitable source. This bulb may be adjustably supported 1n any suitable and well known manner upon the relector-9 which is concave intorln and has its interior Asui-tace preferably highly polished t`l give power and distance to the light. ThieI r Hector may be secured in any suitable Inanner, directly or indirectly, to the base and, as ehownv` its edges may extend around the base of the hollow triangular casi ing. l*

The operation will be readily ululerstood. The lightproduced by the bulb i-8 either passes directly through or is reflected through the base. 2- ot the hollow casing' 410- and by reason' of the concavity of the reflector; even though the base -2- be plano. a certain portion of the light iS con 'ccntrateih thereby producing the .spot of `Torn), as ior instance, the form Shown in Fic'. it, whereby a ,greater concentration of the light will be produced and thereby a more powerful spot-light, but the same is not essential where a concaved reflector is used outside oi and operating in connection with a plano wall o't the hollow casing. Tn-

other words, by giving a lenticular power tothe wall of thecaainpr through which the light is projected, the intensity of the spot can be varied.

All of the walls of the hollow casing eX- this covering7 should preferably have a bathing or cover ing of solid White, and although it may not be essential that all of the Walls should have tial that the inclined rear Wall 3 should be so equipped in order to produce a c ear and uniform light.` The side Walls -yl2- and -13 are preferably, as shown, formed of glass, assembled with and secured to the other parts in any suitable mechanical and well known. mannen Although l have shown and described a specific form and construction ot headlight as illustrative of my invention, it will be understood that various changes and modi cations may be made in the details et `forni, construction and arrangement with out departing from'tbe spirit of this invention as set 'forth in the appended claims.

Whatfl claim is l. A. lamp casing comprising a transpar ent lfront wall, a transparent bottom Wall,

' an inclined opaque substantially white rearl Wall extending from the top edge of the `front Wall to the rear edge of the bottom wall, a pair of opposite triangular' substantially parallel fiat 'white walls forming with said front, bottom and rear Walls a substantially closed triangular casing, a source of nevertheless it is quite essenlight exterior' of the said triangular casing and a concave relector about the said source of light and projecting rays therefrom through the said transparent bottom Wall upon the inclined opaque rear wall.

' 2. A lamp casing comprising a transparent iront wall, a vitreous transparent bottoni if'all, an inclined opaque vitreous rear wall having a substantially white background, said rear all extending from sul stantially the top edge ot the front Wall to the rear edge of the lower Wall, a pair of substantially parallel side Valls disposed perpendicular to the bottom Wall and having a white background and 'forming with said front, bottom and lrear `walls a substantially closed triangular casing, a source oit lightexterior of said triangular casing and disposed adjacent the bottom wall thereof and' a concave reflector about the said source of light and projecting rays therefrom through the said. transparent bottomvwall upon the inclined rear Wall.

-ln Witness whereoi" l have hereunto set my hand this lst day of December, 1917.

VILLIABI H. STEA'D.

Witnesses: p

FRANK A. ONEIL, Fminmuoir J. Muriel-um 

